vena maxillaris vs vena

vena maxillaris and vena both are nouns.

Word	Noun	Adjective	Verb	Adverb
vena maxillaris	Yes	No	No	No
vena	Yes	No	No	No

As nouns, vena is a hypernym of vena maxillaris; that is, vena is a word with a broader meaning than vena maxillaris:

vena maxillaris: posterior continuation of the pterygoid plexus; joins the superficial temporal vein to form the retromandibular vein
vena: a blood vessel that carries blood from the capillaries toward the heart

Other hypernyms of vena maxillaris include vein, venous blood vessel.

vena maxillaris (noun)	vena (noun)
posterior continuation of the pterygoid plexus; joins the superficial temporal vein to form the retromandibular vein	a blood vessel that carries blood from the capillaries toward the heart